Heater.



W. S. HADAWAY, JR.

HEATER.

APPLICATION FILED MAR. 11, 1913.

Patentd May 19, 1914.

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ATTORNEY WILLIAM S. HADAWAY, JR., OF NEW ROCHELLE, NEW YORK.

HEATER.

Specification of Letters Patent.

Patented May 19, 1914.

Application filed March 11, 1913. Serial No. 753,505.

To all whom it may concern Be it known that I, WILLIAM S. HADA- WAY,J11, a citizen of the United States, and a resident of New Rochelle, inthe county of lVestchester and State of New York, have invented certainnew and useful Improvements in Heaters, of which the following is aspecification, reference being had to the accompanying drawings, forminga part thereof.

My invention relates to heaters and has special reference to such asembody electrically heated steam generators.-

One object of my inventionis to provide a simple and durable heater thatshall possess the advantages of both a steam heater and an electricheater Without having the disadvantages of either.

Another object of my invention is to provide a heater of the aforesaidcharacter that shall be adapted for supplying heat intermittently orperiodically to work having a relatively large and a varying heatcapacity.

Other objects will be set forth hereinafter.

I will describe my invention in the following specification and pointout the novel features thereof in appended claims.

Referring to the drawings: Figure 1 is an elevation of a heaterconstructed in accordance with my invention. and embodying a stocking.mold, certain of the parts being broken away to disclose tho heater elements. Figs. 2 and 3 are transverse sections on the lines 22 and 33 ofFig. 1.

Like characters of reference designate corresponding parts in all thefigures.

With special reference to Figs. 1, 2 and 3, a stocking mold 10 ispartially heated by steam which is supplied to it from a steam generator30. Only one mold is shown but several molds may, and probably will besupplied from the same generator.

The mold comprises a flat hollow metal body 11 which is so formed as toproduce the desired shape in a stocking which is stretched and driedupon it. The shape of the mold will depend upon the use to which it willbe put and is not essential to my invention.

Within the hollow body is a flattened tube 12 which is bent around theedge of the mold and constitutes a steam passage, and electric heaterunits 13, 14, 15 and 16. Each of the v metal sheath 20. r

The units 13 and '14 are respectively placed in the center of the footandleg of the mold and the units 15 and 16 areplaced one on each side ofthe unit l t-near the bottom end of the mold. The hollow body is thussubstantially filled by the steam tube and the heater units together. i

As hereinafter more fully pointed out, the heater units 13 to 16inclusive are not solely depended upon for supplying heat to the moldbut are particularly advantageous in supplementing the steam tubes, insupplying heat to the portions of the mold where the demand is greatestand for preventing the condensation and accumulation of water in thesteam tube at thesepoints. Inasmuch as stockings, as usuallyconstructed, are reinforced at the toe and heel and at the top, itrequires much more heat at'the corresponding points in, the mold, duringthe process of stretching and drying the wet stocking,

The heater units 15 and 16 assist in preventing condensation in thesteam tubes near the bottom of the mold (corresponding to the top of thestocking) and the heater unit 13 prevents condensation in the steam tubeat the toe and heel of the" mold.

Thegenerator 30 may be of any suitable structure, 1 have shown forconvenience, a heat generator which is arranged and constructed likethat shown in my co-pending application Ser. No. 749,596 filed February20th, 1913. This generator comprises a body 31 having a pluralityofsubstantially parallel grooves or channels 32. and a cover plate in thechannels are disposed a plurality of flattened tube sections 34 whichare spaced apart by electric heater units 35. Each of the units may besimilar in construction to the units 13 to 16 above described. Theflattened tube sections are closed at one end and at the other extendmitwardly from the body of the generator and are sealed into the header36 which establishes a communication between them. The header isprovidedwith end caps 37 and the respective ends of the flattened tube12 are connected to it and communicate with it.

The tube system composed ofthe header, the flattened tubes of thegenerator and the steam tube 12 of the mold, is partially filled withwater and operates as a closed system to which water is only suppliedtocompensate for leakage. Thev water may be supplied in any suitableway, as for example, by pouring it through a funnel (not shown)connected to the system asin my co-pending application Ser: No. 749,595filed February 20th, 1913.

When a heater such as a stocking mold is in service a large amount ofheat is drawn from the mold when the wet stocking is ap plied to it andsince the stocking is usually reinforced at the toe and heel, a largeramount of heat is necessary to dry out these portions as already pointedout. Considerable difiiculty is'experienced in obtaining a mold ofsuitable shape and size to which snh'icient heat is applied to maintainthe proper temperature under such extreme conditions as exist when thewet stocking is first applied. If electric heaters alone are utilized,it is diflicult to obtain such a distribution of heat as to avoid onepart of the stock ing being dried out more rapidly than the other parts.The mold is thin and its heat capacity is necessarily small so that thetemperature of the mold is likely to be materially reduced at the timethe stocking is aplied.

p If a steam heated mold is utilized, the steam passages are liable tobecome clogged with condensed water by reasonof their small size incross section and the sudden demand for a large quantity of heatrelative to the heat capacity of the mold.

With the arrangement of my present invention, however, the steamgenerator which is outside of the heated mold may readily be made ofample capacity to supply heat to the mold and maintain a fixedtemperature even when the demand is relatively great. At the same timewater cannot accumulate if any is condensed in the mold by reason of thefact that the electric heater units which form a part of the mold supplysufficient heat to vaporize it when the load is reduced. It is thusevident that the heater is essentially a cl'osed steam heater theworking body of which is provided with a simple and automatic means forinsuring perfect drainage under periodic application of relatively largeload.

The stocking mold heater illustrated is only one form and the matrixpress heater another form of my invention, which is equally applicableto glove molds and to various uses that will determine to a greater orless degree the size and shape of the mold or heated body.

What *I claim is:

1 A heater comprising a solid heated body having a steam passage, asteam generator outside of the solid body communicating with thepassage, and means in the solid body for imparting heat to the passage.

2. A heater comprising a solid heated body having a steam passage, asteam generator outside of the solid body communicating with thepassage, and an electric heater in the solid body for imparting heat tothe passage. 3. A heater comprising a heated body having a st ampassage, a steam generator outside of the body communicating with thepassage and comprising a fluid containing chamber, and electric heaterelements for imparting heat thereto, and means in the body for impartingheat to the passage.

4. A heater comprising a heated body having a steam passage, a steamgenerator outside of the body communicating with the passage andcomprising a fluid containing chamber, and electric heater elements forimparting heat thereto, and electric heater elements in the body forimparting heat to said passage.

5. A heater comprising a heated body having a steam passage and shapedto conform to the work to which it is adapted to transfer heat, anelectrically heated steam generator outside of the heated body andarranged to supply steam to said passage, said body comrising anelectric heater arranged to supply heat to said passage, whereby thewater condensed in the passage when the work is applied is vaporizedwhen the work is removed.

6. A heater comprising a heated body having a steam passage adapted tobe subjected periodically to a relatively large load, electric heaterunits arranged to impart heatdirectly to the passage and a steamgenerator outside of the body arranged to supply steam to said passage.

7. A heater comprising a stocking mold having steam tubes therein, anelectric element arranged to impart heat to the steam tubes and a steamgeneratoroutside of the mold arranged to supply steam to the tubes.

8. A heater comprising a heated body having a steam passage, a steamgenerator communicating with said passage and means associated with thebody for imparting heat thereto and directly to the p ssage to vaporizethe condensed water in t e passage.

9. A heater comprising a. mold of definite shape having a steam passa e,a steam generator outside of the mol communicating with the passage, andmeans in the mold for imparting heat to the passage.

10. A heater comprising a mold of defimy hand this4 day of March in theyear nite shape having steamdtubes thereini1 an 1913. I electric elementarrange to impart eat ,7 L to the steam tubes, and a steam generatorILLIAM HADAWAY 5 outside of the mold arranged to supply Witnesses:

steam to the tubes. R. J. DEARBORN,

In Witness whereof, I have hereunto set F. GRAVES.

